遵循Fréchet收敛方法,以很高的收率制备了以1,3,5-三苯苯为核心分子和3、6、9或12个末端烯丙基醚基团的荧光Fréchet型聚(芳基醚)树状聚合物。烯丙基双二糖脂衍生物Cs [1,1'-μ-SiMeH-3,3'-Co(1,2-C 2 B 9 H 10)2对烯丙基醚的区域特异性加氢合反应]导致不同世代的Féchet型聚阴离子金属树枝状大分子装饰有3、6和9个钴双二咔唑单元。起始树枝状聚合物在室温下在紫外线照射下显示出光致发光特性;然而,在用钴双双糖脂衍生物官能化之后,荧光性质被淬灭。产品通过FTIR,NMR和UV-vis光谱学进行了充分表征。对于金属树枝状大分子,UV-vis吸收是评估周边附着在树枝状大分子结构上的钴双二糖脂单元的实验数量的一个很好的工具,从而证实了树枝状大分子的统一特性。由于这些化合物的阴离子特性和富含硼的含量,
depend on the nature of the cluster and the substituent on the Ccluster. Cyclic voltammetry indicates that there is no electronic communication between the core and the peripheral carboranyl fragments. Due to the high boron content of these molecules, we currently focus our research on their biocompatibility, biodistribution in cells cultures, and potential applications for boron neutroncapture therapy
explored the application of metathetic strategy to construct C3-symmetric molecules starting with commercially available p-hydroxy acetophenone and p-hydroxy benzonitrile through cyclotrimerization, double bond isomerization, and ring-closing metathesis as key steps. We also studied photophysical properties of these molecules by fluorescence spectroscopic data. All compounds except 1 and 2 exhibit strong
我们报告了带有氧杂环庚烷和苯并呋喃环系统的C 3对称星形苯基和三嗪中心核的新合成策略。在这方面,我们探索了复分解策略的应用,以市售的对羟基苯乙酮和对羟基苯甲腈为原料,通过环三聚、双键异构化和闭环复分解作为关键步骤构建 C 3对称分子。我们还通过荧光光谱数据研究了这些分子的光物理特性。除1和2外的所有化合物都显示出强荧光。